Recent content by alliecr

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    Six homework questions on radioactivity, light, pressure, and forces

    Homework Statement Question 1: A gram of radioactive material has a half life of x. Homework Equations Please not that this is a generally question and I am not actually solving for X. After x amount of time, how much will be left? The Attempt at a Solution I believe the answer is...
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    Graphing a function on a given interval ?

    Graphing a function on a given interval...?? My problem is: Use a graphing calculator to graph the function...? ...over the given interval f(x)= -x^4+3x^3-4x+3 (-2,3). How do you graph something on a specific interval? P.S. I have the Casio fx-9750G PLUS graphing calculator.
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    Undergrad Wrong Answer From Calculator for x^2-1 (all over) x+4

    Where does the+1 come from? I had this before I got my answer: [tex]4a^{2}-2a-2a+1-1...the ones would cancel out right?
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    Undergrad Wrong Answer From Calculator for x^2-1 (all over) x+4

    I am not getting the answer that my calculator is giving me for the following: Find the following values for x^2-1 (all over) x+4 f(2a-1) I am getting 4a^2 (all over) 2a+3 for my final answer and my calculator is getting (2a-1)^2-1 (all over) 2a+3. What did I do wrong? Also, how do...
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    High School What Are the Steps to Solve These Circle and Slope Math Problems?

    1.) How do you answer this? Find the equation of the line that has a slope undefined and passes through the points (3, -4). I got y=-4 ------------------------ 2.) Write the standard and general equations of the circle with radius 4 and center (1,2). I got STANDARD: (x-1)^2 +...
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    Which color of light maximizes photosynthesis rate and CO2 uptake?

    In which color will the rate of photosynthesis be greatest, smallest and how will this be reflected in the CO2 levels, why?
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    High School Confused about the substitution rule in integration

    I know the product, quotient, and chain rules. I get confused when I get to the something du= something dx. Now, I have to take that and put it in the original. Please explain that part. Is there like a formula or something for that part?
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    High School Confused about the substitution rule in integration

    I understand that u is just another letter, but after you take the hardest part of the equation and find the derivative you have some du=dx. Now you must write that in the form of the equation. This is the part where I get stuck.
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    High School Confused about the substitution rule in integration

    Yes, I know how to do those things. I mostly get confused when you have to write the problem with u an du.
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    High School Confused about the substitution rule in integration

    Here are the problems that I have. Thanks again, Allison
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    High School Confused about the substitution rule in integration

    Can someone please explain the Substitution Rule to me in easier terms? I am soooo confused! Thanks, Allison
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